EP0461528B1 - Filmbehandlungsgerät mit einer absorbierenden Rolle zur Beseitigung von Wasserflecken - Google Patents

Filmbehandlungsgerät mit einer absorbierenden Rolle zur Beseitigung von Wasserflecken Download PDF

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Publication number
EP0461528B1
EP0461528B1 EP91109132A EP91109132A EP0461528B1 EP 0461528 B1 EP0461528 B1 EP 0461528B1 EP 91109132 A EP91109132 A EP 91109132A EP 91109132 A EP91109132 A EP 91109132A EP 0461528 B1 EP0461528 B1 EP 0461528B1
Authority
EP
European Patent Office
Prior art keywords
film
rollers
roller
path
squeegee
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91109132A
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English (en)
French (fr)
Other versions
EP0461528A2 (de
EP0461528A3 (en
Inventor
Kenneth W. C/O Eastman Kodak Company Oemcke
Evan P. C/O Eastman Kodak Company Carmichael
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of EP0461528A2 publication Critical patent/EP0461528A2/de
Publication of EP0461528A3 publication Critical patent/EP0461528A3/en
Application granted granted Critical
Publication of EP0461528B1 publication Critical patent/EP0461528B1/de
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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D15/00—Apparatus for treating processed material
    • G03D15/02—Drying; Glazing

Definitions

  • the present invention relates to a film processor having an absorbent roller which substantially eliminates water spots on processed film sheets.
  • processors for photographic film sheets transport the film sequentially through a series of stations where latent images on the film are developed by a developing solution, then the developed image is fixed by a fixing solution, the sheet is washed to remove residual solutions on the film and subsequently dried.
  • rollers to remove at least a portion of the various solutions between stations in a processor.
  • a guide roller removes at least some of the developer from film as it travels between two developing areas in a processor.
  • U.S.A. Patent No. 4,853,727 discloses a roller which is biased against the film as it is moved between two wash sections in a film processor.
  • This roller removes a layer of washing agent present in one wash solution before the film enters a second wash solution.
  • the processing apparatus disclosed in U.S.A. Patent No. 4,875,067 has a rotating brush which contacts a surface of the film after it is sprayed with a developer.
  • rollers of the patents described above contact a surface of the film as it travels along its normal film path.
  • These patents also disclose various squeegee rollers along the path of movement of the film for driving the film along its path and for separating adjacent processing solutions from one another by squeezing the solutions from the surfaces of the film as it moves through the squeegee rollers.
  • a bead of liquid may cling to the trailing edge of the film after it leaves the rollers.
  • a bead of water on the tail end of the film entering the drying station can be deposited onto the beginning roller in the dryer rack of the dryer station. This bead of water will travel with the surface of the roller and be deposited onto the surface of the next sheet of film entering the dryer rack.
  • water spots are formed on the sheet of film which are viewable by the customer. Such spots are undesirable, not only because of their appearance but because they may obscure the image on the developed sheet of film. Therefore, it is important to reduce or eliminate water spots, especially on x-ray film where high quality, unobscured images are important.
  • the document JP-A-62 250 451 discloses a photographic sensitive material processor including a plurality of stations, wherein the processed film is passed between squeegee rollers before entering in the drying station. Between the squeegee rollers and the first transporting rollers of the drying station, a plurality of absorbent rollers are arranged which continuously contact both sides of the film when it is transported along a conveying path defined by the drying rollers themselves.
  • an absorbent roller is provided in the drying station and located outside the normal film path between the squeegee rollers and the transport rollers in the drying station, the absorbent roller being positioned with respect to the normal path for film so that the absorbent roller is contacted by the trailing end portion of the film when the trailing end leaves the squeegee roller and is deflected out of the normal film path.
  • a processor for sheets of film such as x-ray film, is generally designated 10 and comprises racks 12, 14, 16 and 18 of rollers for transporting film sheets sequentially through a developing station 13, a fixing station 15, a washing station 17 and a drying station 19, respectively.
  • Roller rack 12 comprises vertical rows of center rollers 20 and side rollers 22,24. Rollers 20 are rotated counterclockwise and rollers 22,24 are rotated clockwise so that a sheet of film can be fed downwardly in the rack between the rollers 20,22 and upwardly in the rack between the rollers 20 and 24.
  • a turnaround roller 26 and associated nip rollers 28 together with guide shoes 30 cause a sheet of film leaving the path defined by rollers 20,22 to be inverted and guided into the path for the film defined by rollers 20,24.
  • the sheet is deflected into the rack 14 by deflection members, not shown.
  • Rack 14 is similar in construction and operation to the rack 12 and thus need not be described in detail.
  • Roller rack 16 for the wash station comprises a plurality of pairs of rollers 30,32 which define a nip.
  • the film passes through the nip of the rollers and is driven downwardly through the roller rack by these rollers until the film sheet reaches the bottom of the rack where a shoe 34 deflects the sheet from the wash rack into the dryer rack 18.
  • a shoe 34 deflects the sheet from the wash rack into the dryer rack 18.
  • a pair or squeegee rollers 40,42 are located along a film path 44 at the point where the film leaves the washing station 17 and enters the drying station 19.
  • the shoe 34 deflects the film into the nip between squeegee rollers 40,42, and the rollers 40,42 are effective to drive the film in a generally horizontal plane as it enters the drying station.
  • the squeegee rollers force most of the wash water from the surfaces of the film to facilitate drying of the film in station 18.
  • the drying station 19 comprises a first transport roller 46 which is driven in a clockwise direction to urge a sheet of film to the right, as viewed in the drawings, and into engagement with a curved shoe 48.
  • the portion of the film path between the rollers 40,42 and the shoe 48 is substantially horizontal.
  • the shoe deflects the film upwardly into a second portion of the film path, which is located in a generally vertical plane.
  • the drying station has a series of vertically-spaced rollers 50 located along one side of the film path 44 and another series of vertically-spaced transport rollers 52 located along the other side of the film path 44. Rollers 50 are rotated in a counterclockwise direction, as viewed in the drawings, and rollers 52 are rotated in a clockwise direction.
  • rollers 52 are not only spaced from each other, but are also positioned generally between two adjacent rollers 50 so that the film travels along a sinuous shaped path as it moves upwardly from shoe 48.
  • the leading end of the film is engaged and driven by rollers 50,52 before the trailing end leaves the nip defined by rollers 40,42.
  • Air tubes 54 circulate warm air through the drying station to facilitate drying of the film.
  • An absorbent roller 56 is provided in the drying station 18. Roller 56 is located outside the normal film path between squeegee rollers 40,42 and transport rollers 46, 50 and 52 in the drying station. More specifically, absorbent roller 56 is located beneath the first portion of the film path 44 between squeegee roller 42 and transport roller 46 with the uppermost portion of roller 56 being just below the first portion of the film path 44.
  • the film when the film leaves squeegee rollers 40,42 it may have a bead of water on its trailing end, as shown at 62 in Figure 2.
  • the bead of water wipes across the absorbent roller 56 and is removed from the end of the film by the absorbent roller.
  • the bead of water is deposited on roller 46, or one of the other transport rollers, and when the next sheet of film enters the drying station the bead of water can be deposited on that sheet of film to cause a defect known as water spots. Because the bead of water is removed from the film by the absorbent roller 56, water spots are greatly reduced or eliminated.
  • Roller 56 can be made entirely of an absorbent material or, if desired, the roller can comprise a solid inner body portion covered with a suitable absorbent material.
  • roller 56 By locating the absorbent roller below the normal film path 44 between rollers 40,42 and roller 46, water absorbed by roller 56 is not deposited on subsequent sheets as the travel along the horizontal portion of path 44. Therefore, water spots on film sheets are eliminated or greatly reduced, thus improving appearance and image quality. Also, roller 56 is rotated slightly in response to engagement by the tail end of the film so the roller presents a new, dry portion of the roller to the next sheet of film. In addition, warm air circulated through the drying station by tubes 54 will heat the absorbent material and remove water deposited onto the absorbent roller, thus drying the roller.

Claims (3)

  1. Prozessor (10) für Filmblätter mit Rollenanordnungen (12,14,16,18) zum nacheinander erfolgenden Transport des Films durch die Entwicklungs-, Fixier-, Wasch- und Trocknungsstation (13,15,17,19), wobei die Rollen zwei am Ausgang der Waschstation (17) angeordnete Quetschrollen (40, 42) aufweisen, die den Film in die Trocknungsstation (19) befördern, und die darin vorgesehenen Transportrollen (46, 50,52) von den Quetschrollen beabstandet sind und eine Bahn (44) für den aus den Quetschrollen austretenden Film bilden, wobei die Filmbahn einen an die Quetschrollen anschließenden ersten Abschnitt und einen nachfolgenden zweiten Abschnitt aufweist, der zum ersten Abschnitt in einem Winkel angeordnet ist, so daß bei Eintritt des Filmvorlaufendes in den zweiten Bahnabschnitt und Austritt des Filmnachlaufendes aus den Quetschrollen das Filmnachlaufende aus dem ersten Bahnabschnitt ausgelenkt wird,
    dadurch gekennzeichnet, daß in der Trocknungsstation außerhalb des ersten Bahnabschnitts (44) zwischen den Quetschrollen (40,42) und den Transportrollen (46,50,52) eine saugfähige Rolle (56) angeordnet ist, die den Film bei seiner von den Quetschrollen bewirkten Bewegung durch den ersten Bahnabschnitt nicht berührt, wobei die Saugrolle (56) zum ersten Bahnabschnitt so angeordnet ist, daß sie vom Filmnachlaufende (60) berührt wird, wenn dieses aus den Quetschrollen austritt und aus dem ersten Bahnabschnitt ausgelenkt wird, wodurch ein am Filmnachlaufende vorhandener Flüssigkeitswulst (62) von der Saugrolle entfernt wird.
  2. Prozessor nach Anspruch 1, dadurch gekennzeichnet, daß die Saugrolle zwischen einer der Quetschrollen (42) und der ersten Transportrolle (46) in der Trocknungsstation angeordnet ist.
  3. Prozessor nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß Mittel (54) zum Erwärmen der Saugrolle vorgesehen sind, um diese zu trocknen.
EP91109132A 1990-06-11 1991-06-04 Filmbehandlungsgerät mit einer absorbierenden Rolle zur Beseitigung von Wasserflecken Expired - Lifetime EP0461528B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/535,627 US5006875A (en) 1990-06-11 1990-06-11 Film processor with absorbent roller to eliminate water spotting
US535627 1990-06-11

Publications (3)

Publication Number Publication Date
EP0461528A2 EP0461528A2 (de) 1991-12-18
EP0461528A3 EP0461528A3 (en) 1992-08-26
EP0461528B1 true EP0461528B1 (de) 1995-04-19

Family

ID=24135060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91109132A Expired - Lifetime EP0461528B1 (de) 1990-06-11 1991-06-04 Filmbehandlungsgerät mit einer absorbierenden Rolle zur Beseitigung von Wasserflecken

Country Status (4)

Country Link
US (1) US5006875A (de)
EP (1) EP0461528B1 (de)
JP (1) JP2648534B2 (de)
DE (1) DE69108983T2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5407790A (en) * 1994-02-04 1995-04-18 Eastman Kodak Company Radiographic system for orthopedic imaging
US6678913B1 (en) * 2000-09-01 2004-01-20 San Lab Systems Apparatus and method for cleaning film

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1623528A (en) * 1923-03-03 1927-04-05 Eastman Kodak Co Process and apparatus for treating film
US2472596A (en) * 1946-05-17 1949-06-07 Eastman Kodak Co Removal of excess liquid from wet film
US3422479A (en) * 1964-12-29 1969-01-21 Saul Jeffee Apparatus for processing film
US4063324A (en) * 1976-03-26 1977-12-20 Kroy Industries, Inc. Film processing apparatus
DE3111157A1 (de) * 1981-03-21 1982-09-30 Agfa-Gevaert Ag, 5090 Leverkusen Vorrichtung zur verminderung der verschleppung von behandlungsfluessigkeiten
JPS6259957A (ja) * 1985-09-10 1987-03-16 Fuji Photo Film Co Ltd 感光材料現像装置
JPH0612436B2 (ja) * 1985-11-05 1994-02-16 コニカ株式会社 感光材料処理装置
JPS62250451A (ja) * 1986-04-23 1987-10-31 Konika Corp 新規の乾燥手段を有するハロゲン化銀写真感光材料の処理装置
US4875067A (en) * 1987-07-23 1989-10-17 Fuji Photo Film Co., Ltd. Processing apparatus
JPS6472158A (en) * 1987-09-13 1989-03-17 Konishiroku Photo Ind Automatic developing machine
DE3734097A1 (de) * 1987-10-09 1989-04-27 Du Pont Deutschland Verfahren und vorrichtung zum behandeln eines photographischen aufzeichnungsmaterials

Also Published As

Publication number Publication date
EP0461528A2 (de) 1991-12-18
JP2648534B2 (ja) 1997-09-03
DE69108983T2 (de) 1995-11-23
JPH04253056A (ja) 1992-09-08
DE69108983D1 (de) 1995-05-24
US5006875A (en) 1991-04-09
EP0461528A3 (en) 1992-08-26

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